Valve



(No Model.)

- R. C. BROMLEY.

` VALVE. .Y No. 805,884. Patented'Jun-e 7,1898.

l I l NITED STATES APfiENT OFFICE.

4ROBERT o. BRoMLEY, or Pirrsune, PENNSYLVANIA.

VALVE.

SPECIFICATION forming part of yLette-irs Patent No. 605,384,` dated June '7, `1898.

i y Application iledOctoher 27, 1897-1, Serial No.' 656,573. (No model.)

To all whom, if may concern: Y

Be it known that I, ROBERT C. BROMLEY, a citizen of the United States, residing at Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented or dis-W covered a new and useful Improvement `in Valves, of which the following is a full, clear,"

and exact description, reference being had to the accompanyingdrawings, forming part of this application, in whichy Figure 1 is a cent-ral longitudinal vertical section taken through myimproved valve in anV opened position. Fig. 2 is a horizontal longitudinal section taken on the line II II of Fig. 1, showing the valve open. Fig. 3 is a similar view showing the valve closed. Fig. 4 is a vertical cross-section taken'on `the line The forni of valve embodied in the present invention is designed to avoid and obviate the tendency to bind before the valve is properly in position to close, which' is a very general fault with this class of valves and which is entirely overcome in myconstruction, while I have embodied in it extreme simplicity and cheapness of construction.

Referring now to the drawings, 2 `is the valve-case, provided with end flanges 3 for making attachment with the main, or, if desired, threads may be used. The inner faces l 4. of the valve-seats are ground to make a flat face which preferably extends backward toward the stem of the valve for a distance approximating the length of travel.A Located centrally of the valve-case is a disk-base 5, provided with an extended boss 6, which, with the base, is internally threaded `for engagement with the valve-stein 7, mounted in the end of the valve-case and having an encircling collar 8 to prevent longitudinal movement. A gland 9 compresses packing 10 around the stein to prevent leakage. The disk-base 5 is provided on each opposite outer facewith circular inclined planes or ,camfaces 11, andupon each of such-faces is mountednthe disk 12, provided with corre-` spondingcam -faces 13, conformingto the same degree as the faces 11 and with which they conformso that rotation of the disks upon the disk-base will result in a movement of `thedisk-faces outwardly or. inwardly from or toward the center of the disk-base.`

It is desired that the disks shall maintain 4a non-rotatory position while advancing toward and from the valve-seat, thus preventing friction or wear, and that they will :rapidly 'ad- Vance toward and from the seat at the endof the forward stroke and commencement of the back stroke. To thisend each disk is provided with a lateral arm 14, provided with a pivoted roller 15, which in theback travel of the valve bears against the opposite parallel vertical faces 1 6,.reversingthe.disks upon the cam-faces and allowing them to recede from contact with the faces 4. In the path of each arm'14L at each side is an interfering abutment 17, adapted to engageth'e forward fiat face 18 in the forward travel ofthe valve` andf to rotate it in a reverse direction as it ad- Avances over Athe seat 1l. The effect of such reverse rotation is to separate the faces of the disks 12 and to cause'them to bind tightly against the faces of the valve-seat at the Vend of the stroke by reason of the expanding action of the contracting cams 1l and 13, and the position anddegree of such cams is so ad@ j usted that the disks are brought tightly into contact with the valve-'faces just when the valve has reached the proper position of its travel, and further travel is eectually pre vented `by reason of such binding action. Upon reversal of the valve the pivoted wheels will strike against the Vcorners 19 of the guide 16, throwing the disks around and irnrnediV ately releasing the pressure by the reverse ac` tion of the cams, when the further withdrawal of the'valve is rendered comparatively easy.

Upper and lower parallel guiding edges 20 serve to retain the disks in position laterally,

their peripheries bearing against euch edges at all times, as clearly shown in Fig. 2.fr

Each disk is provided with a central inai wardly-projecting stem or stud 21, which extends into the corresponding `opening 22 in ICO Vthe disk-base, such stud servingas an axial i center upon which the disk rotates and whereby it is kept in a central position upon the base. These studs 2l are of comparatively short length and do not extend as far as the threaded hole through the base, so that an uninterrupted passage is left for the stem 7 Having described my invention, .what I claim, and desire to secure by Letters Patent, 1s-

1. In a valve, a central reciprocating nonrotary disk-base provided with cam-faces and centrally-mounted rotating valve-disks thereon provided with corresponding cam-faces, substantially as set forth.

2. In a valve, a central reciprocating nonrotary disk-base provided with cam-faces and centrally-mounted rotating valve-disks thereon provided with corresponding cam-faces and means for rotating the disks, substantially as set forth.

3. A valve comprising a case having oppositely-located seats, a non-rotary central base adjustably mounted on a valve-stem having inclined faces on opposite sides, and centrally-mounted rotating valve-disks thereon provided with corresponding inclined faces, and means for rotating the disks, substan# tially as set forth.

4. A valve comprising a case having oppositely-located seats a non-rotary central base abutments beyond such ends, with an intervening recess, and a non-rotary central base adjustably mounted on a valve-stem having inclined faces on opposite sides, centrallymounted rotating valve-disks thereon provided with corresponding inclined faces, and projecting arms adapted to engage such abutments and abutting ends on the forward and back travel respectively, substantially as set forth.

7. In a valve provided with guiding edges terminating in abutting ends, abutments beyond such abutting ends, with an intervening space: rotating disks mounted on a nonrotating base and having lateral arms adapted to engage the abutments and to bear upon the abutting ends, and to reverse the disks upon backward movement, substantially as set forth.

8. In a valve provided with rotating disks `having lateral arms with rollers mounted therein and adapted to be seated -upon the valve-faces, guiding edges for the lateral arms terminating in abutting ends, substantially as set forth.

In testimony whereof I have hereunto set my hand this 12th day of July, 1897.

ROBERT C. BROMLEY.

Vitnesses:

PETER J. EDWARDS, C. M. CLARKE. 

